Changes in the field of publishing and in scholarly communication have been impacting the distribution of scientific knowledge for years. The economics of publishing continues to have an impact on subscribers' ability to maintain access and therefore the readership of established publications may diminish or look for legitimate alternatives to gain access. For an audience of both scientists and librarians, this poster session will provide an overview of Green Open Access (OA) in the Geosciences. Green Open Access provides an opportunity to balance a scholar's need to publish in respected journals with the importance of widespread distribution of research. Authors, publishers, and repository managers can work together to ensure widespread access to high quality research. The author will describe "Green OA" vs. "Gold OA", highlighting opportunities that are available to many authors through institutional and in some cases subject repositories, and review publishers and their associated high-impact journals for their support of Green Open Access.